Here are the resources I’ve used and still use to learn how to program and code. I had gone years without it and you definitely can, but you’re worth so much more armed with the knowledge found in the following resources.
PHP: http://www.w3schools.com/php/
XML: http://www.w3schools.com/xml/default.asp
WordPress Themes
http://yoast.com/wordpress-theme-anatomy/
http://digwp.com/
http://www.webdesignfromscratch.com/wordpress-tutorials/top-10-resources-for-getting-started-with-wordpress-themes/
